This page displays temporal trends of Himawari-9 HSD location errors. The regional averages of error correction vectors are plotted, with each point corresponding to one image. The error correction vector is decomposed into a north-south component (top chart; positive for image shifting northward), an east-west component (second chart; positive for satellite image shifting westward), magnitude (third chart) and direction (fourth chart; positive for clockwise rotation from image shift to the south). The unit of the top three charts is the single infrared pixel length for band 13 (2 km spatial resolution at the sub-satellite point), and that of the direction chart is degrees. The last chart shows the number of analyzed vectors obtained in landmark analysis, and is used to compute their average over the region.